Some of his best-known works include the Carlos III Square in Olite, Navarre; the Square in the old city of Estella, the Golf Club of Zuasti, the Convention Centre and Auditorium of Navarre, the Convention and Exhibition Centre of Palenica, the Felipe II Square in Madrid and the Archaeological Museum of Vitoria.

Mangado's work is also recognised abroad. In Goa , India , he created a monastery, a church and an aid centre while in Japan he built the library of Kansai. In Europe his main works have been the Pey-Berland Square in Bordeaux , France and the complex which is made up of the square, cultural centre and church in Thiene , Italy .